Each person on a team brings a unique perspective to the process; i.e., how things work; what happens when changes are made, and how to sustain improvements during daily work. Contributions are made from each individual's skill set and the team's synthesis of ideas.
Division of labor is the economic term for the practice of assigning small parts of a complicated job to individual workers who specialize in doing just their small part.
Labor specialization is what economists called division of labor. This is the practice of breaking up a big job, like building an automobile, into smaller jobs. Once the details of each small task are worked out, the tasks are assigned to individual workers.